Which piece of information is critical when a vessel sends a distress alert?

The position of the vessel is critical when a ship sends a distress alert because it provides rescuers with the exact location where assistance is needed. Accurate positioning allows emergency services to determine the nearest resources for timely intervention, which can be lifesaving. In distress situations, every second counts, and knowing the vessel's position enables a rapid response, increases the chance of effective rescue, and minimizes the risks involved.

While other pieces of information such as the name of the captain, the color of the ship's hull, and the type of engine may be useful for identification or operational purposes, they do not provide the immediate critical data that rescuers require to locate the distressed vessel. Thus, the position is paramount and directly relevant when responding to a distress call.